diff --git a/agaric/css/agaric.css b/agaric/css/agaric.css
index 2c3f650..9d7d1bb 100644
--- a/agaric/css/agaric.css
+++ b/agaric/css/agaric.css
@@ -7647,6 +7647,13 @@ a.navbar-link:focus,
   color: #0D1E34;
   background-color: #FFFFFF; }
 
+.light-header a.navbar-item:hover,
+.light-header a.navbar-link:hover,
+.light-header a.navbar-item:focus,
+.light-header a.navbar-link:focus {
+  color: #FFFFFF;
+  background-color: #0D1E34; }
+
 .navbar-link .navbar-item.is-active::before, .navbar-item .navbar-item.is-active::before {
   display: none; }